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D78F9234 Schematic ( PDF Datasheet ) - NEC

Teilenummer D78F9234
Beschreibung UPD78F9232
Hersteller NEC
Logo NEC Logo 




Gesamt 30 Seiten
D78F9234 Datasheet, Funktion
Preliminary User’s Manual
78K0S/KB1+
8-Bit Single-Chip Microcontrollers
µPD78F9232
µPD78F9234
Document No. U17446EJ1V0UD00 (1st edition)
Date Published April 2005 NS CP(K)
©
Printed in Japan
2005
Free Datasheet http://www.datasheet4u.com/






D78F9234 Datasheet, Funktion
INTRODUCTION
Target Readers
Purpose
Organization
How to Use This Manual
This manual is intended for user engineers who wish to understand the functions of
the 78K0S/KB1+ in order to design and develop its application systems and programs.
The target devices are the following subseries products.
78K0S/KB1+: µPD78F9232, 78F9234
This manual is intended to give users on understanding of the functions described in
the Organization below.
Two manuals are available for the 78K0S/KB1+: this manual and the Instruction
Manual (common to the 78K/0S Series).
78K0S/KB1+
User’s Manual
Pin functions
Internal block functions
Interrupts
Other internal peripheral functions
Electrical specifications (target values)
78K/0S Series
Instructions
User’s Manual
CPU function
Instruction set
Instruction description
It is assumed that the readers of this manual have general knowledge of electrical
engineering, logic circuits, and microcontrollers.
To understand the overall functions of 78K0S/KB1+
Read this manual in the order of the CONTENTS.
How to read register formats
For a bit number enclosed in a square, the bit name is defined as a reserved
word in the RA78K0S, and is defined as an sfr variable using the #pragma sfr
directive in the CC78K0S.
To learn the detailed functions of a register whose register name is known
See APPENDIX C REGISTER INDEX.
To learn the details of the instruction functions of the 78K/0S Series
Refer to 78K/0S Series Instructions User’s Manual (U11047E) separately
available.
To learn the electrical specifications (target) of the 78K0S/KB1+
See CHAPTER 21 ELECTRICAL SPECIFICATIONS (TARGET VALUES).
6 Preliminary User’s Manual U17446EJ1V0UD
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D78F9234 pdf, datenblatt
11.4.2 Asynchronous serial interface (UART) mode.............................................................................196
11.4.3 Dedicated baud rate generator ..................................................................................................210
CHAPTER 12 MULTIPLIER...................................................................................................................217
12.1 Multiplier Function ...................................................................................................................217
12.2 Multiplier Configuration...........................................................................................................217
12.3 Multiplier Control Register ......................................................................................................219
12.4 Multiplier Operation .................................................................................................................220
CHAPTER 13 INTERRUPT FUNCTIONS ............................................................................................221
13.1 Interrupt Function Types.........................................................................................................221
13.2 Interrupt Sources and Configuration .....................................................................................222
13.3 Interrupt Function Control Registers.....................................................................................224
13.4 Interrupt Servicing Operation .................................................................................................229
13.4.1 Maskable interrupt request acknowledgment operation.............................................................229
13.4.2 Multiple interrupt servicing .........................................................................................................232
13.4.3 Interrupt request pending...........................................................................................................233
CHAPTER 14 STANDBY FUNCTION ..................................................................................................234
14.1 Standby Function and Configuration.....................................................................................234
14.1.1 Standby function........................................................................................................................234
14.1.2 Registers used during standby ..................................................................................................236
14.2 Standby Function Operation...................................................................................................237
14.2.1 HALT mode ...............................................................................................................................237
14.2.2 STOP mode...............................................................................................................................240
CHAPTER 15 RESET FUNCTION .......................................................................................................244
15.1 Register for Confirming Reset Source...................................................................................251
CHAPTER 16 POWER-ON-CLEAR CIRCUIT .....................................................................................252
16.1 Functions of Power-on-Clear Circuit .....................................................................................252
16.2 Configuration of Power-on-Clear Circuit...............................................................................253
16.3 Operation of Power-on-Clear Circuit......................................................................................253
16.4 Cautions for Power-on-Clear Circuit......................................................................................254
CHAPTER 17 LOW-VOLTAGE DETECTOR .......................................................................................256
17.1 Functions of Low-Voltage Detector .......................................................................................256
17.2 Configuration of Low-Voltage Detector.................................................................................256
17.3 Registers Controlling Low-Voltage Detector ........................................................................257
17.4 Operation of Low-Voltage Detector........................................................................................259
17.5 Cautions for Low-Voltage Detector........................................................................................262
CHAPTER 18 OPTION BYTE................................................................................................................265
CHAPTER 19 FLASH MEMORY ..........................................................................................................268
19.1 Features ....................................................................................................................................268
19.2 Memory Configuration .............................................................................................................269
12 Preliminary User’s Manual U17446EJ1V0UD
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